Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7345100 | Water-based ink composition for ball-point pen | Kiyoshi Iwamoto, Yoji Takeuchi, Masaru Miyamoto | 2008-03-18 |
| 7279512 | Water-based ink composition for ballpoint pen | Kiyoshi Iwamoto, Yoji Takeuchi, Masaru Miyamoto | 2007-10-09 |
| 6099629 | Water based ink and water based pigment ink having metallic lustrous color for ballpoint pen | Masaaki Morita | 2000-08-08 |